And as for explaining why Loki has an off spring that appears as an adult, don't forget, Loki is probably 1000 years old. we saw Odin pick up Loki in Thor, in the year 963 A.D, so thor and loki are bother older than 1000. which is clearly an adult lol. Even if Hela is only say, 500 years old, that is more than enough time for her to become an adult. I'm sure that thor and Loki have looked as they do now for hundred of years. And Hela appearing as an older looking woman, could be due to the wear and tear of ruling a realm/magic use??

The only problem I have with Loki having fathered Hela pre-exile is that I don't get the idea that Loki would have fathered any illegitimate children at the time of Thor's story line. I'm going to have to go with Loki messing around with all that Timey Wimey stuff after his exile which would explain Hela being as aged as she would be. In short, in a burst of unimpeded freedom to do whatever he liked without Odin holding him back Loki would have shagged her mother in the past and conceived her I suppose.

__________________“Ultimately, we have a cultural problem where we put a huge currency on sexualizing young girls,” she says. “It’s been a problem for a while, but I feel like it’s reached a fever pitch.” - Rashida Jones on Internet Pornography

- If you want to be with me you need to calm down, chill out, slow down and enjoy the ambiance of where you are. There is peace in silent solitude and staying in one place. Otherwise we have no future at all.